"use client";

import Lenis from "lenis";
import { useEffect } from "react";

/**
 * Mount once at the root layout. Wires Lenis to requestAnimationFrame.
 * The expo-out easing pairs well with the deck's snap-feel.
 */
export function SmoothScroll() {
  useEffect(() => {
    const lenis = new Lenis({
      duration: 1.1,
      easing: (t) => Math.min(1, 1.001 - Math.pow(2, -10 * t)),
      smoothWheel: true,
      wheelMultiplier: 1,
      touchMultiplier: 1.5,
    });

    let rafId = 0;
    function raf(time: number) {
      lenis.raf(time);
      rafId = requestAnimationFrame(raf);
    }
    rafId = requestAnimationFrame(raf);

    return () => {
      cancelAnimationFrame(rafId);
      lenis.destroy();
    };
  }, []);

  return null;
}